C vs GenR8
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
C
This app analyzes photographs to display the color of any point in XYZ and L*a*b* color spaces. It also allows for measuring the distance between two colors within the L*a*b* color space. Calibration options are available for matching camera characteristics and photography environments.
- Color measurement in XYZ and L*a*b*
- Distance measurement between colors
- Camera characteristic adjustment
- Photography environment calibration
- Color checker calibration
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C-MEASURE is application to measure a simple color. It display the color of an arbitrary place of the photograph in XYZ, L*a*b*. In addition, It can measure distance on the L*a*b* color space of two colors. The conversion parameter to the chromaticity value performs the adjustment that It matched with the characteristic of the camera of iPhone4 from photograph data, but the calibration that It accept photography environment, and used the color checkers is possible.
GenR8
Generate professional test patterns for display calibration and validation. Supports external displays via HDMI, DisplayPort, or AirPlay, with HDR pattern support and precision controls for accurate results. Export patterns in various formats.
- 28+ Professional Test Patterns
- External Display Support (HDMI, DisplayPort, AirPlay)
- HDR Pattern Support
- Audio Test Tones & Live Metering
- Precision Controls & Customizable Overlays
- Export Test Patterns
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KEY FEATURES: * 28+ Professional Test Patterns - SMPTE color bars, calibration grids, convergence patterns, HDR test signals, luma stepping, IRE patterns, and more * External Display Support - Connect via USB-C to HDMI/DisplayPort or AirPlay. Full 1:1 pixel mapping for accurate calibration * AV Sync Test * Audio Test Tones - Sine, square, sawtooth, and white noise waveforms from 20Hz to 20kHz with live stereo metering * HDR Pattern Support - PQ curve test patterns, HDR color bars, and BT.2111 UHD patterns for HDR display validation * Precision Controls - Customizable aspect ratio overlays, diagnostic crosshairs, border guides, and adjustable scanning color bars * Live Audio Metering - Real-time L/R level meters with peak detection for audio signal monitoring * iPad Optimized - Split-view interface with pattern library sidebar and full-screen preview * Customizable Overlays - Display resolution info, clock, date, custom text, and diagnostic guides * Export Test Patterns in PNG, PDF, JPG, TIFF PERFECT FOR: - Video engineers calibrating displays - AV technicians testing signal chains - Filmmakers validating monitor accuracy - Content creators ensuring color fidelity - Anyone needing professional test patterns on the go DISPLAYS SUPPORTED: *External monitors, projectors, TVs, and broadcast displays via HDMI, DisplayPort, or AirPlay. Made with precision for professionals who demand accuracy.
Screenshots
Verdict
The clearest difference is review sentiment: GenR8 at 100% against C's 0%. GenR8 also leads on rating (4.9 vs 1.0) and update cadence (every 10 days vs every 14 months). C's advantage is price ($2.99 vs $19.99) and iOS requirement (13.0 vs 17.0). On ads, in-app purchases, monetization model and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
C costs $2.99 and GenR8 $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
GenR8 holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: GenR8 has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of C's written reviews are positive against 100% of GenR8's.
C ships an update every 14 months, GenR8 every 10 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.
| Parameter | C | GenR8 |
|---|---|---|
| Price | $2.99 — better | $19.99 |
| Rating | 1.0 (1 ratings) | 4.9 (9 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 9 — better |
| Update frequency | Every 14 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | alpha prompt co.,ltd. | Christopher Van Hoose |
Customer experience
C
GenR8
In-app purchases
C
No in-app purchases
GenR8
No in-app purchases





